plumper smith



J. P; SMITH. LIQUID METER.,

. Patented JulyrlZ, 1870,

i y am ses an entre J. rLUMMuR SMITH, or BUFFALO, vNew YORK, AssIcNoR To HIMsnLr AND,

HENRY cHANDLER, or sans PLACE.

Letters Patent No. 105,379, dated July 12, 1870.

IMPROVEMENT IN LIQUID-METERS.

The Schedule referred. to Ln these Letters' Patent and making part cf the same..

I J- PLUMMER SMITH, Signor @CHENEY OHAND' `z', which passes through a suitable bearing, J, at the LER and` myself, both of the city of Buffalo, in the county of Erie and State of New York, have invented certain new and usefulimprovements `in Liquid-Meters, of which the following is a specification.'

My improvements relate 'to that class of liquid-meters in which dil'erential or proportional yalves are employed, whereby the quantity.'ot liquid' passed through thepipes is ascertained by the measurement of the relatively small quantity that passes through l the smaller valve, between the size of the aperture of .which and that of the larger valve acertain and known ratio always exists, whatever the positionof the valves may be.l

The invention consists of two parts, one of which relates' to the particular construction and manner. of

position, looking at right angles from Fig. .T-

Figure III is a sectional plan of the-valves. Figure IV is an 'enlarged .detached view in elevatiou ofthe smaller valve, represented i'n the'position it is when the large valveis fully open.

Figure V is a similar view of the same inthe position it is when the'larger valve isclosed.

Figure VI is a vertical section.' of the measuring-V chamber and wheel. Y Figure V11 ,is a fragmentary view, showing thc cam for tilting the wheel. l Likeletters of reference designate like parts in each of," the figures. y 4

A is the induction-pipe. B, the seat and chamber of the. main valve. O isa bed-plate, preferably cast as a flange from the portion B, to ,which is hermetically secured, in. any

suitable manner, the dome or `cap D', of glass or metal.

E is the main valve, of conical form, arranged vertically, and having astem, e, extending from both top and bottom, and passing through guides ff, as shown, or in any other suitable way, lthe upper stem e being provided with a weight,'G, at itsto'p.

H is a hollow pillar, secured to the bed-plate, through which an exitQpassage from the pillar is formed.

Near the upper end of this ,pillar the chamber h opens into the dome D through a' small aperture, h',- which forms theport of the small valve.

`The surfaceof the pillarsurrouuding this aperture is faced, and has `fitted to it an oscillating cam, I, which, asit operates, gradually opens and closes the aperture h', as will presently be explained.

Thiscam is provided with a horizontal stem or axis,

top of pillar H.

The projecting end of this axis is provided with a screw-thread and au adjusting-nut, fit, by which to regulate the pressure of a spiral spring, i, interposed between it and the end of the bearing, whereby the cam`is kept in proper contact with the valve-seat or .faced surface surrounding the aperture h'.v

Motion from the valve E is transmittedto the cam by means of the jointed bars K L, theformer being hinged to the end of an arm, M, pendent from thel `the forked end of the arm L, so as `to uncover, when the valve E is fully open, such a portion of the aperture h (as shown in Fig. IV) as will form the required ratio with the open aperture of themain valve.. The edge of the cam is then soshaped as -to gradually. cover and reduce .the size of the aperture h' in the same proportion, and as the aperture of the main valve is closed by the descent of the valve E, until it en` tirely covers the aperture (as shown at Fig. V) at the moment the main passage is completely closed.

Knowing the relative sizes of the two valv'es,'and measuringthe liquid that passes through' tbc smaller, the quantity that has passed through the 'larger is ascertained by simple calculation, and, by constructing. the registering-device accordingly, the: passage of a representative unit quantity through the smaller valve will he indicated on the registering-dialby a unit expressing the actual quantity passed through the pipe. The water or other liquid, as it escapesthrough the valve E into the dome l), passes thence, through au opening in'the bed-plate,4 into the eduction-pipe O, except the small quantity. which is required for the small valve, which is discharged c? conducted from the latter directly into the measuring-chamber, or through a pipe, s, therein, as shown iu the drawing.

I represents this chamber, and

Q, the measuring-wheel, preferably composed of three buckets, g gg q, as represented in Fig. VI.

The shaft r of this wheel projects outside through vertical slots tin the sides of the vessel, and has its ,bearings in brackets u u'.

One end of this shaft is provided with a screw, u,

which engages with a wheel, c', Vfrom which motion is' communicated to the train-gear w of the -registeringdevice, which gearing and registering apparatus may be of any suitable or common construction; 4

The opposite end ofthe shaft has mounted thereona triangular cam, az, which restsand turns on the flat surface of the bearing u.

The cam is made triangular, to correspond with the number of buckets in the wheel Q, a side being required for-each bucket, and it is so arranged, with refelence tothe bearing surface, that while any one of the buckets is being filled, the side of the cam corsponding therewith willrest on the bearing and auppurt the wheel.

- The length of the sides of the cam is so regulated that, when any one of the buckets has received the required quant-ity of liquid, the weight of it will be just suicient to cause it to Vtilt and empty its contents, the wheel making onethird of a revolution and resting, at this end, on the next adjacent side of the cam, while the buckets will have simply moved forward one degree, so as to change places with each other.

I prefer touse a threebucket Wheel, although a Wheel with a greater number maybe employed.

The quantity of liquid which each bucket holas bevfore tilting constitutes one representative unit, which Witnesses:

ALBERT A. ABBoTT, W'ILLLIM A. ABBOTT. 

